The building was designed by Robert Mack Built as a town house and office for Lord Powerscourt, Richard Wingfield 3rd Viscount (1730-1788). It is built in granite mined from the Powerscourt estate in Co. Wicklow. 

The house took three years to complete and cost £80,000. 

Lord Powerscourt was known in Dublin as the 'French Earl', because he had made the Grand Tour and returned home wearing the latest Parisian fashions. Richard died here in 1788 and was laid out in state for two days, with the public being admitted to view him. 

The house was bought by the Government in 1807. Over the years, the Government made expansive alterations to the property.  Francis Johnston, architect of the G.P.O. and St. George's Church, added three groups of buildings around the courtyard for use as a stamp office.  There are other examples of Johnston's work nearby on Clarendon Street, with the Clock tower and Bell. 

The Powerscourt Centre is a fine example of Dublin's Georgian architecture., and has become a regular test for students of architecture. It is unique in showing the transition from rococo style to neo-classic under one roof.  Meldon, in his 'Views of Dublin' (1779) said the house ' may be considered in point of consequence of appearance and architectural embellishment, as the third private edifice in Dublin.' 

Guided Tours of the house are available.

For more information on the Powerscourt Townhouse Centre, Click Here